i'm not sure if this was mentioned in the picture in the op, but this
also pokes through your steams friends lists and such and gets your gameplay habits of the games you play on steam
people also have gripes with this because
1. it can or will lead to even more moneyhatting so epic knows what games to give on their store for free
2. literally GDRP violations
3. spyware (already stated in the op)
i've also gotten word that it
still collected data even after steam profiles were set to private as a result of GDRP so that's a yikes
(edit: source is from the resetera forums, which the op of that thread made a way for you to replicate and test of how the epic store checks your steam stuff for friends and gameplay habits, but i haven't been here in a long while so i'm not sure if i can post a link to other forums)
edit 2: on second thought, i'll just leave images from that thread in here (pagestretch warning)
epic games had also responded to this problem yesterday, but theres a few problems with their response- i've unfortunately forgotten what the problems were, but i'll return to reading through the page to find it and update once i do
edit 3: also to note, from info gained from the article on resertera, it seems that the person that made steamspy is also an employee at epic games